Abstract

Using Mössbauer spectroscopy on ⁵⁷Fe nuclei and X-ray diffraction, the mechanism of mechanical alloying in a planetary ball mill of the Fe–Cr nanocrystalline system in a concentration range from 20 to 48 at % Cr has been studied in detail. It has been established that mechanical alloying occurs in one stage at a concentration of up to 30 at % Cr and in three stages at higher concentrations. The change in the mechanism of mechanical alloying occurs as iron is saturated with chromium and is caused by the inversion of the sign of the mixing energy from negative to positive.

中文翻译：

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机械合金化过程中Fe-Cr体系的结构相变和短程有序演化

摘要

使用Mössbauer光谱对^57个Fe核和X射线衍射进行了详细研究，研究了在浓度范围为20至48 at％Cr的Fe–Cr纳米晶体系统的球磨机中机械合金化的机理。已经确定，机械合金化在一个阶段以最高30％Cr的浓度发生，在三个阶段以更高的浓度发生。机械合金化的机理发生变化是因为铁中充满了铬，这是由于混合能符号从负向正反转引起的。